Change docker default folder in Ubuntu

docker.md

In file /lib/systemd/system/docker.service

change the line

ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

to

ExecStart=/usr/bin/dockerd --data-root /new/docker/path -H fd:// --containerd=/run/containerd/containerd.sock

then run

sudo systemctl daemon-reload
sudo service docker restart

To access it via bash

docker exec -it <container name> /bin/bash